USN-4738-1: openssl Ubuntu

Published
Published 18-02-2021Last modified 27-04-2026

Vulnerability summary

USN-4738-1 is a vulnerability in openssl Ubuntu with no CVSS score yet.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS scoreNot scoredRisk metrics not yet published.
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 2 · Downstream 0 · Related 2
CVE-2021-23840CVE-2021-23841

Timeline

  1. 18-02-2021
    PublishedVulnerability first disclosed.
  2. 27-04-2026
    Last modifiedVulnerability information updated.

Description

openssl, openssl1.0 vulnerabilities Paul Kehrer discovered that OpenSSL incorrectly handled certain input lengths in EVP functions. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2021-23840) Tavis Ormandy discovered that OpenSSL incorrectly handled parsing issuer fields. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2021-23841)

CVSS metrics

Risk metrics not yet published.

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu2 products
  • openssl< 1.0.2g-1ubuntu4.19 | < 1.1.1-1ubuntu2.1~18.04.8 | < 1.1.1f-1ubuntu2.2
  • openssl1.0< 1.0.2n-1ubuntu5.6

1 vendor · 2 products

References

3 links